Practice? Some do, some don't, some should, some won't...
I do because I need to...
My buddy, Dave doesn't, because he's never needed to...
I have instruments all over my house... I never watch TV without one of them in my lap... Dave sleeps all day,watches sports all night and never touches an instrument unless he paid to... He doesn't even have a guitar in his home...
and yet, as good as I am, he's always been able to play circles around me... a cruel irony...
Our band never practices, unless we're backing up someone famous...